benzenul are p = 0,78 g/cm3
V= 200 mL (cm3)
p = m/V => m = pxV = 0,78x200 = 156 g benzen
a)
C6H6 + HONO2 --> C6H5-NO2 + H2O
b)
156 g m g
C6H6 + HNO3 --> C6H5-NO2 + H2O
78 123
=> m = 156x123/78 = 246 g nitro obtinut la 100%
100% .................... 246 g
70% ..................... Cp= 172,2 g
c)
156 g md g
C6H6 + HNO3 --> C6H5-NO2 + H2O
78 63
=> md = 156x63/78 = 126 g HNO3
c% = mdx100/ms
=> ms = mdx100/c% = 126x100/63 = 200 g sol. HNO3